The decorative paint on the iron art railing is rich and varied, predominantly hand-painted with imported paint, exuding both rustic elegance and modern fashion. Classic surface finishes include antique bronze, red bronze, antique gold, black gold trim, copper gold trim, and white gold trim.
To ensure good adhesion between the decorative coating (plating) and the surface of ironwork products, it is necessary to thoroughly clean the surface of the ironwork products of oxidation scale, slag, rust stains, grease, dirt, and moisture prior to coating (plating). Otherwise, it may lead to bubbling, cracking, peeling, and other phenomena. The term "pretreatment" refers to the use of mechanical or chemical, electrochemical, and other process methods to eliminate surface defects on the ironwork products before coating (plating).
1. The primary methods for rust removal and scale/oxide slag cleaning include manual treatment, mechanical treatment, jet treatment, chemical treatment (acid pickling), electrochemical treatment, and flame treatment.
Hand processing primarily employs sandpaper, scrapers, chisels, wire brushes, worn-out sanding wheels, and other tools. It relies on manual sanding, hammering, scraping, and brushing to remove rust, oxidation scales, weld slag, and other surface dirt.
Mechanical treatment commonly employs tools such as air (electric) brushes, rust-removing guns, polishing wheels, and air (electric) shovels, utilizing the high-frequency impact and friction of mechanical force to remove rust and oxides, old paint, and other污垢. Jet treatment uses mechanical centrifugal force, compressed air, high-pressure water flow, and other power sources to propel abrasives, sandstones, and steel shot onto the surface of ironwork products, striking and abrading off oxides, rust spots, old paint, and molding sand.
Chemical treatment involves immersing or dissolving ironwork products in an acidic solution with a special formula, which, through chemical reactions, removes oxidation scales, rust stains, and oil residues, commonly known as "pickling."
2. Degreasing for ironware typically involves organic solvents, alkaline solutions, electrochemical methods, and various metal cleaners available on the market are quite suitable.
